摘要
随着国家对废物循环利用的鼓励和推广,工业副产石膏在水泥生产过程中得到广泛应用。石膏中的主要成分为硫酸钙,但工业副产石膏中也含有不稳定的亚硫酸钙,对石膏及石膏制品的物理性能产生一定影响。试验证明工业石膏中含有亚硫酸钙,用盐酸溶解法测定三氧化硫,结果偏高。因此提出将石膏中三氧化硫的测定分为含有亚硫酸钙和不含有亚硫酸钙两中情况。若石膏中不含有亚硫酸钙,可直接采用常规盐酸溶解法测定三氧化硫。石膏中含有亚硫酸钙,三氧化硫的测定方法采用过氧化氢氧化法测定的全硫减去二氧化硫的含量,并对过氧化氢氧化法的试验条件进行优化。同时提出石膏中二氧化硫的测定采用碘量法得到,并对试验条件进行优化。
Industrial by-product gypsum has been widely used in the cement production process along with the encouragement and promote recycling of waste. The main components of gypsum are calcium sulfate, but industrial by-product gypsum contains unstable calcium sulfite which affects the physical properties of gypsum and gypsum products. It’s higher results if industrial gypsum have contained calcium sulfite with sulfur trioxide dissolved in hydrochloric acid method through tests. Therefore it cast into the determination of sulfur trioxide containing calcium sulfite and no calcium sulfite. If the gypsum does not contain sulfite, sulfur trioxide is determined by hydrochloric acid solution. If Gypsum contains calcium sulfite, the determination of sulfur trioxide is hydrogen peroxide in the total sulfur content of less sulfur dioxide, and peroxide hydroxide method is optimized experimental conditions. Also makes use of gypsum in the determination of sulfur dioxide oxidation iodometry, and the experimental conditions are optimized.
出处
《中国建材科技》
2010年第S2期222-228,共7页
China Building Materials Science & Technology
关键词
石膏
三氧化硫
二氧化硫
过氧化氢
碘量法
gypsum
calcium sulfate
calcium sulfite
hydrogen peroxide
iodometry
